Thermostatic alarm.



I UNITED srATEs PATENT OFFICE.

-:- THEODORE A. MYERS AND WILLIAM M. cL MANs'oF WHEELINc, WEST VIRGINIA, ASSIGNORS OF ONE-THIRD TQ CHARLES C. SCHMIDT, OF

WHEELING, WEST VIRGINIA.

THERMOSTATICV'ALARIVIY.

I Specification of Letters Patent. Applinationfiled August 25, 1906. Serial No 276,728.

Patented. March 13, 1906,

United States of America, and residents of Wheeling, county of Ohio, and State of West Vir' 'nia, have invented certain new and useful" mprovements in Thermostatic Alarms, of which the following is a specification.

Our invention relates to new and-useful improvements in fire-alarms, and more particularly to a thermostatic alarm; and it consists in the particular construction, arrangement, and combination of parts which will hereinafter be fully described.

The object of the invention is to provide an alarm which is particularly adapted for residences and'which is extremely simple in its construction and inexpensive to manufacture and, further, to provide an alarm which is little liable tobecome out of order, since none of its parts are such as to be affected by age or by atmospheric changes.

1 In describing the invention in detail reference is herein had tothe accompanying drawings, forming a part of this specification, in which Figure 1 is a side elevation of the invention, a portion of the bell being broken away to more clearly illustrate the alarm mechanism; and Fig. 2 -is a front elevation of the invention.

Referring to said drawings, in which like reference numerals designate like parts throu hout the several views, 1 indicates a plate or securing against a wall or in other convenient upright position within a building. Suitably secured to said plate 1 near its lower end is a bracket consisting of a substantially horizontal portion 2 and a vertical portion 3, the latter standing substantially parallel to said plate at a sufficient distance therefrom to admit of the alarm mechanism pi'oper being mounted between it and said ate. p With their ends mounted in the face of the plate 1 is a plurality of posts 4, having ri idly mounted thereon two parallel vertical p ates 5 and 6. J ournaled at its inner end in said plate 5 and at its frontend in a collar 7, with An encircling coil-spring 11, interposed between the plates 5 and 6, is attached to said stem or spindle 8. Rigidly secured upon said stem at or near itsi'nner end is a spurwheel 12, which meshes with a pinion 13, provided upon a shaft 14, which carries upon its outer end a bell-hammer 15, said shaft being journaled said plates 5 and 6, as shown. A

bell 16 is suitably mounted upon said collar 7 to bejengag'ed by said bell-hammer 15. Secured upon the outer face of said vertical portion 3 of the bracket are two lugs 17, to each of which is pivotally attached the lower end of an arm 18. Said arms 18 are ada ted to 'jgip the head 9 of the stem orspin le 8 to mly hold said stem or spindle against the tension of the spring 11, and for thepurpose each arm is provided with a vertical edge-19, said edges being adapted for closely engaging the flat faces 10 of the head 9. Said arms are bent outward at a slight angle to the vertical, as shown, and connecting the upper ends thereof is a fusible wire 20. 1

To set the alarm for use, the spindle 8 is turned, by means of the head 9, to wind up the spring 1 1. When the spring is wound up, the arms 18 are raised until the flat faces 10 of said head are gripped by the vertical edges 19 thereof, when the free ends are connected by the fusible wire 20. When the said Wire 20 1s contacted by flame or is subjected to a high degree of heat, it melts, allowing the arms 18 of their own weight to drop, releasing the spindle 8. Said spindle, actuated by the spring 11, is caused to revolve, and through t e spur wheel, pinion, and shaft 14 the hammer 15 is caused to revolve and to beat against thebell, sounding an alarm.

It will be seen from the foregoing that the device is extremely simple in its construction and is consequently little liable to become out of order. Further, since the fusible wire is not affected by age or by atmospheric changes it is a parent that the device cannot be otherwise t an reliable at all times.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

-1. In a thermostatic fire-alarm, a suitably mounted spindle, an encircling coil-sprin anism intermediate said spindleand said hellwhen the former is revolved the latter is actuated to beat upon the bell, and means for normally holding said spindle against the tension of said spring, said means consisting of two substantially upright arms pivoted at their lower ends below the head of said spindle and firmly engaging the flat faces of the head, and a fusible wire connecting the upper,

or free, ends of said arms, substantially as described.

3. In a thermostatic fire-alarm, the combination with a bell, bell-hammer, and an alarm-train leading to said bell-hammer, of a revoluble spindle in operative engagement with said alarm-train, a spring for actuating said spindle to revolve, a head carried by said spindle, pivoted arms embracing said head to hold said spindle against the tension of said spring, and a fusible wire connecting said arms, said arms being adapted, when released by the fusing of the wire, to release said spindle, substantially as described.

Signed by us in the presence of two subscribing witnesses.

THEODORE A. MYERS. WILLIAM M. CLEMANS.

Witnesses:

THOMAS D. BENNETT, JOHN P. KINDELBERGER. 

